Haris Shaiful Bahari 20th January, 2009 Block C Notes: *A ratio has 3 different ways in writing; (X:X), (X/X) or (X to X). *The word percent means- per… cent/ per 100/ cent = century = 100/ out of 100 Big Idea:Many important practical and mathematical applications involve comparing quantities of one kind or another;
it is important to know which method to use and how we should use them. Essential Question: What methods are there for comparing things? Targeting an Audience Problem 1.2 Investigation 1 A survey of 100 students at NeilsonMiddle School found that 60 students prefer watching television in the evening and 40
students prefer listening to the radio. A.)Read the Statements below about how Neilson students prefer to spend their evenings.
Tell whether each statement accurately reports the results of the survey. Explain your answer. 1.) 6 out of 10 students prefer television to radio. This report is accurate because they reduce 60 students to 6 and the total of 100 students to 10. 2.) Students prefer radio to television by a ratio of 4 to 6. This report is accurate because they reduced 40 students to 4 and 60 students to 6. 3. Students who prefer television outnumber those who prefer radio by 20. This report is accurate because if you subtratct 40 students from 60 students you get 20 students. 4.)Students who prefer television outnumber those who prefer radio by a ratio of 3 to 2. This report is accurate because when you reduce 60 and 40 to their lowest form 60 becomes 3 and 40 becomes 2. 5.) The number of students who prefer watching television is 1.5 times the number who prefer listening to radio. This report is accurate because if you multiply 40 with 1.5 you will get 60. 6.) 40% of the students prefer radio to television. This report is true because there are already 100 students in total and 40 out of a 100 are 40%. 7.) 3/5 of the students prefer television to radio. This report is true because if you reduce 60 and 40 to their lowest form 60 would become 3 and 40 would become 3 and that means
the total now is 5 so 3 students prefer watching television out of 5 student. B.)If you were writing a paper to convince local merchants that they would reach more students by advertising on the radio than on television,
which state from above would you use? Why? If I was trying to convince local merchants I would use advertisement number 6 because it only shows the data for radio but not television. C.)Imagine that you are the advertising director for a television station in the town where Neilson is located.
You have been asked to prepare a report for a meeting between your ad department and a large local skateboard manufacturer.
Which accurate statement from above would you use to try to convince the manufacturer to advertise on your station? Why? I would use statement number 5 because it is only comparing Television to radio and it has only show data about television. Problem 1.2 Follow Up: Conduct a quick survey in your class to find out how many people prefer watching television n the evening and how many
prefer surfing the internet. Class Data Comparison Table
20th January, 2009
Block C
Notes:
*A ratio has 3 different ways in writing; (X:X), (X/X) or (X to X).
*The word percent means- per… cent/ per 100/ cent = century = 100/ out of 100
Big Idea: Many important practical and mathematical applications involve comparing quantities of one kind or another;
it is important to know which method to use and how we should use them.
Essential Question: What methods are there for comparing things?
Targeting an Audience
Problem 1.2 Investigation 1
A survey of 100 students at Neilson Middle School found that 60 students prefer watching television in the evening and 40
students prefer listening to the radio.
A.) Read the Statements below about how Neilson students prefer to spend their evenings.
Tell whether each statement accurately reports the results of the survey. Explain your answer.
1.) 6 out of 10 students prefer television to radio.
This report is accurate because they reduce 60 students to 6 and the total of 100 students to 10.
2.) Students prefer radio to television by a ratio of 4 to 6.
This report is accurate because they reduced 40 students to 4 and 60 students to 6.
3. Students who prefer television outnumber those who prefer radio by 20.
This report is accurate because if you subtratct 40 students from 60 students you get 20 students.
4.)Students who prefer television outnumber those who prefer radio by a ratio of 3 to 2.
This report is accurate because when you reduce 60 and 40 to their lowest form 60 becomes 3 and 40 becomes 2.
5.) The number of students who prefer watching television is 1.5 times the number who prefer listening to radio.
This report is accurate because if you multiply 40 with 1.5 you will get 60.
6.) 40% of the students prefer radio to television.
This report is true because there are already 100 students in total and 40 out of a 100 are 40%.
7.) 3/5 of the students prefer television to radio.
This report is true because if you reduce 60 and 40 to their lowest form 60 would become 3 and 40 would become 3 and that means
the total now is 5 so 3 students prefer watching television out of 5 student.
B.) If you were writing a paper to convince local merchants that they would reach more students by advertising on the radio than on television,
which state from above would you use? Why?
If I was trying to convince local merchants I would use advertisement number 6 because it only shows the data for radio but not television.
C.) Imagine that you are the advertising director for a television station in the town where Neilson is located.
You have been asked to prepare a report for a meeting between your ad department and a large local skateboard manufacturer.
Which accurate statement from above would you use to try to convince the manufacturer to advertise on your station? Why?
I would use statement number 5 because it is only comparing Television to radio and it has only show data about television.
Problem 1.2 Follow Up:
Conduct a quick survey in your class to find out how many people prefer watching television n the evening and how many
prefer surfing the internet.
Class Data Comparison Table